The self-propelled force model of a multi-orifice nozzle for radial jet drilling

被引：55

作者：

Li, Jingbin ^{[1
]}

Li, Gensheng ^{[1
]}

Huang, Zhongwei ^{[1
]}

Song, Xianzhi ^{[1
]}

Yang, Ruiyue ^{[1
]}

Peng, Kewen ^{[1
]}

机构：

[1] China Univ Petr, State Key Lab Petr Resources & Prospecting, Beijing 102249, Peoples R China

来源：

JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING | 2015年 / 24卷

基金：

中国国家自然科学基金;

关键词：

Radial jet drilling; Multi-orifice nozzle; Self-propelled force; Calculation model;

D O I：

10.1016/j.jngse.2015.04.009

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Radial jet drilling (RJD) is an effective method for the stimulation, exploration, and development of oil and gas resources. The multi-orifice nozzle is a type of highly efficient nozzle applied in RJD. It generates the self-propelled force to pull a connected hose moving forward to form a radial hole. However, there are few studies on the self-propelled ability of the nozzle, and there is no model for the calculation of the self-propelled force. This paper developed a convenient model to calculate the self-propelled force and defined a factor to represent the self-propelled ability of the nozzle. The proposed model was validated by means of experiment and numerical simulation. To achieve a stronger self-propelled ability, we investigated the effects of the number, angle, and diameter of the orifices on its self-propelled ability. The results show that the forward orifices exert a negative effect on the self-propelled ability, whereas their angles present a positive effect. With an optimal angle, the backward orifices primarily generate the self-propelled force. Although an enlarged orifice diameter can improve the performance of the nozzle, it still has an optimal value for the limitation of flow rate and jet pressure. This study provides a reference for the design of multi-orifice nozzles and hydraulic parameters for radial jet drilling technology. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：441 / 448

页数：8

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